ASoC: Remove unused AK4535 hardware read functionality

Nothing uses it and the existing hw_read operation needs to be
refectored so it's easier to remove it rather than work with it.
Support can be re-added if the code requires volatile registers.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/codecs/ak4535.c b/sound/soc/codecs/ak4535.c
index dd33802..0abec0d 100644 (file)
--- a/sound/soc/codecs/ak4535.c
+++ b/sound/soc/codecs/ak4535.c
@@ -59,21 +59,6 @@ static inline unsigned int ak4535_read_reg_cache(struct snd_soc_codec *codec,
        return cache[reg];
 }
 
-static inline unsigned int ak4535_read(struct snd_soc_codec *codec,
-       unsigned int reg)
-{
-       u8 data;
-       data = reg;
-
-       if (codec->hw_write(codec->control_data, &data, 1) != 1)
-               return -EIO;
-
-       if (codec->hw_read(codec->control_data, &data, 1) != 1)
-               return -EIO;
-
-       return data;
-};
-
 /*
  * write ak4535 register cache
  */
@@ -635,7 +620,6 @@ static int ak4535_probe(struct platform_device *pdev)
 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
        if (setup->i2c_address) {
                codec->hw_write = (hw_write_t)i2c_master_send;
-               codec->hw_read = (hw_read_t)i2c_master_recv;
                ret = ak4535_add_i2c_device(pdev, setup);
        }
 #endif